Comp. Models of the Mind III b Flashcards Preview

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Flashcards in Comp. Models of the Mind III b Deck (15):

Assumptions at work in process/task models?

- activity consists of tasks performed in pursuit of goals
- hierarchical task descriptions
- plans as conditions for combining tasks


Two ways in which task descriptions in process/task models can be seen as hierarchical:

- Goals are held in a stack (push & pop operations)
- Goals can be broken into subgoals, which can be broken into tasks


Critique of process/task models:

task models are engineering approximations:
- do they actually describe how human cognition works?
- > do they need to? (Marr's levels)
- do they describe cognitive operations or just actions?


What does GOMS stand for?

Goals, Operators, Methods, Selection rules


GOMS can be described as ...

... a framework for task analysis of routine (!) cognitive skills!


What are examples for routine (!) cognitive tasks that can be analysed by GOMS?

Known tasks
Tasks requiring no problem-solving
e.g. Text editing with a familiar text editor


First step in GOMS:

hierarchical task composition


What can be said about the step Goals in GOMS?

define desired states and methods available to achieve them


What can be said about the step Operators in GOMS?

achieve subgoals:
elementary perceptual, motor or cognitive acts


What can be said about the step Methods in GOMS?

achieve goals:
procedures conditional on working memory and world state


What can be said about the step Selection in GOMS?

choice btw competing methods:
conflict resolution


What does KLM stand for?

Keystroke-Level Model


What is KLM an example of?

Of a GOMS model.


What is the result of a KLM?

prediction time = sum of contributions


What does CMN in CMN-GOMS stand for?

Cognitive Perceptual Motor